3205131613 has 2 divisors, whose sum is σ = 3205131614. Its totient is φ = 3205131612.

The previous prime is 3205131551. The next prime is 3205131617. The reversal of 3205131613 is 3161315023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2660702724 + 544428889 = 51582^2 + 23333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3205131613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3205131617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602565806 + 1602565807.

It is an arithmetic number, because the mean of its divisors is an integer number (1602565807).

Almost surely, 2^3205131613 is an apocalyptic number.

It is an amenable number.

3205131613 is a deficient number, since it is larger than the sum of its proper divisors (1).

3205131613 is an equidigital number, since it uses as much as digits as its factorization.

3205131613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 3205131613 is about 56613.8818047305. The cubic root of 3205131613 is about 1474.3998880968.

Adding to 3205131613 its reverse (3161315023), we get a palindrome (6366446636).

The spelling of 3205131613 in words is "three billion, two hundred five million, one hundred thirty-one thousand, six hundred thirteen".